A 25-year-old woman is in the clinic for her first prenatal visit. The nurse will prepare to obtain which laboratory screening test at this time?

A) Urine toxicology
B) Alpha-fetoprotein
C) Complete blood cell count
D) Carrier screening for cystic fibrosis

At the onset of pregnancy, a routine prenatal panel usually includes a complete blood cell count, serologic testing, rubella antibodies, hepatitis B screening, blood type and Rhesus factor, and antibody screen. A clean-catch urine sample is collected for urinalysis to rule out cystitis. Urine toxicology, although beneficial for women if active substance abuse is suspected or known, is not routinely performed. In the second trimester, maternal serum is analyzed for alpha-fetoprotein. Carrier screening for cystic fibrosis is offered to check whether a person carries the abnormal gene that causes cystic fibrosis but is not part of routine testing.